Fix for the empty notify message fuckup

0016-If-the-notification-message-length-is-0-ignore-the-m.patch

@@ -0,0 +1,31 @@
+From d22ed4fb5c503575bc4d62b599d790ebce8cbab4 Mon Sep 17 00:00:00 2001
+From: Jorge Niedbalski <jorge.niedbalski@canonical.com>
+Date: Wed, 28 Sep 2016 18:25:50 -0300
+Subject: [PATCH] If the notification message length is 0, ignore the message
+ (#4237)
+
+Fixes #4234.
+
+Signed-off-by: Jorge Niedbalski <jnr@metaklass.org>
+---
+ src/core/manager.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/src/core/manager.c b/src/core/manager.c
+index 4d84a0b37e..a085ed899a 100644
+--- a/src/core/manager.c
++++ b/src/core/manager.c
+@@ -1648,6 +1648,10 @@ static int manager_dispatch_notify_fd(sd_event_source *source, int fd, uint32_t
+ 
+                 return -errno;
+         }
++        if (n == 0) {
++                log_debug("Got zero-length notification message. Ignoring.");
++                return 0;
++        }
+ 
+         CMSG_FOREACH(cmsg, &msghdr) {
+                 if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {
+-- 
+2.9.0
+

systemd.spec

@@ -12,7 +12,7 @@
 Name:           systemd
 Url:            http://www.freedesktop.org/wiki/Software/systemd
 Version:        231
-Release:        4%{?gitcommit:.git%{gitcommitshort}}%{?dist}
+Release:        5%{?gitcommit:.git%{gitcommitshort}}%{?dist}
 # For a breakdown of the licensing, see README
 License:        LGPLv2+ and MIT and GPLv2+
 Summary:        A System and Service Manager
@@ -51,6 +51,7 @@ Patch0012: 0012-shared-install-properly-report-masked-units-listed-i.patch
 Patch0013: 0013-Revert-pid1-reconnect-to-the-console-before-being-re.patch
 Patch0014: 0014-systemd-ignore-lack-of-tty-when-checking-whether-col.patch
 Patch0015: 0015-shared-install-do-not-enable-masked-instances-4005.patch
+Patch0016: 0016-If-the-notification-message-length-is-0-ignore-the-m.patch
 
 Patch0998:      0998-resolved-create-etc-resolv.conf-symlink-at-runtime.patch
 
@@ -945,6 +946,9 @@ getent passwd systemd-journal-upload >/dev/null 2>&1 || useradd -r -l -g systemd
 %{_mandir}/man[1578]/systemd-nspawn.*
 
 %changelog
+* Thu Sep 29 2016 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 231-5
+- Denial-of-service bug against pid1 (#1380286)
+
 * Thu Aug 25 2016 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 231-4
 - Fix preset-all (#1363858)
 - Fix issue with daemon-reload messing up graphics (#1367766)